A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 6220-01-174-2035
NSN 5925-01-226-3200
NSN 5935-00-156-0563
NSN 6650-01-529-6721
NSN 6240-00-434-3771
NSN 6145-00-462-0594
NSN 5996-01-044-2465
NSN 4140-00-679-9512
NSN 6645-00-200-2324
NSN 5855-01-528-2309
NSN 5930-01-009-7495
NSN 5920-01-214-5508